Ivanovic rolls in Bali

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Sports Network

Nov 4, 2010

, Last Updated: 1:54 PM ET

BALI, Indonesia -- Former world No. 1 Ana Ivanovic cruised into the semifinals, while top-seeded Li Na suffered a quarterfinal upset Thursday at the $600,000 Tournament of Champions, the final event on the 2010 WTA calendar.

The ageless Date Krumm pulled off the upset in 2 hours, 22 minutes, as the world No. 11 Li piled up eight double faults and had her serve broken no less than seven times.

Meanwhile, Ivanovic, who won the first 11 games against her Russian counterpart on Day 1, cruised in 56 minutes, with the help of six aces, five service breaks and seven doubles faults from Pavlyuchenkova, who is the WTA's highest-ranked teenager at No. 20.

"It was an almost perfect performance," said Ivanovic. "Anastasia is a tough opponent and even though the score indicates it was easy, there were still a few close games. I thought I served well, played aggressively and moved well, so there wasn't much wrong today."

Ivanovic made a return to the top 25 last month after capturing her first title in two years, in Linz, and Thursday marked a continuation of that form.

"It gives you confidence, not only the scoreline, but the way you play. I really think things are coming back together. I feel the things I've been working on, I can see them working in matches now, and that makes a big difference when you are under pressure and playing the important points in a match."

Ivanovic will meet Date Krumm in Saturday's semis.

"I've never played Ana before," said Date Krumm. "She's tough, and so is everybody here. Ana won Linz a few weeks ago. I'm just going to continue to try my best."

The Tournament of Champions is an eight-woman, single-elimination event. It features players who have captured at least one International tournament during the year and who did not participate in singles at the year-end WTA Championships in Doha last week. The tournament also has the option to award players wild cards into the event.